STCF05 STMicroelectronics, STCF05 Datasheet - Page 23

• Manufacturer Part Number: STCF05
• Description: HIGH POWER WHITE LED DRIVER WITH I2C INTERFACE
• Manufacturer: STMicroelectronics

Specifications of STCF05

• Flash Mode: up to 400 mA
• Torch Mode: up to 120 mA

STCF05
9.10
Table 13.
1. 20 mA output current is achievable only if the supply voltage is higher than 3.3 V.
Table 14.
Table 15.
9.11
9.12
current [mA]
LED current [mA]
AUXI (hex)
SHUTDOWN MODE
AUX LED
Internal step
LDIM (hex)
TDIM (hex)
FDIM(hex)
SUB ADD=03
RESET Value
(read mode)
STAT_REG
Power ON,
AUXT_0~3
This 4 bit register controls the timer that defines the ON-time of the AUX LED current
source. ON-time starts when the AUXI register is loaded with any value other than zero, and
stops after the time defined in the AUXT register. Values from 1 to 14 of the AUXT register
correspond to an ON-time of the AUX LED ranging from 100 to 1400 ms in 100 ms steps.
The value 15 puts the AUX LED to the continuous light mode. The activation/deactivation of
the AUX LED current source is controlled using only the AUXI register.
Auxiliary LED dimming table
Torch mode and flash mode dimming registers settings
Status register
LED_S
This bit is set by the STCF05 when the voltage seen on the current mirror is above 1.2 V
during a torch or flash operation. This condition can be caused by shorted LEDs, This bit is
reset by the STCF05 following a read operation of the STAT_REG.
F_RUN
This bit is kept HIGH by the STCF05 during flash mode. By checking this bit, the
microprocessor can verify if the flash mode is running or has been terminated by the time
counter.
0.0
0
1.3
15
1
0
0
1
LED_S
MSB
2.6
2
0
20
1
1
2
4.0
3
F_RUN
30
2
2
3
0
5.3
4
45
3
3
4
Doc ID 15257 Rev 4
6.6
(1)
LED_O
5
0
60
4
4
5
8.0
6
NTC_W
75
9.3
5
5
0
6
7
0
10.6 12.0 13.3 14.6 16.0 17.3 18.6 20.0
90
8
6
6
1
7
NTC_H
0
120
9
7
7
2
8
A
160
OT_F
8
3
9
0
B
200
10
9
4
Registers description
OC_F
C
0
240
11
A
5
D
VOUTOK_N
320
12
B
6
E
LSB
0
23/33
400
13
C
7
F